The Activities of Rhizosphere Bacteria in Improving the Growth of Habanero Pepper (Capsicum chinense Jacq.) and Soil Fertility

Isabella Avwerosuoghene Onoharigho¹ , Adeniyi Adewale Ogunjobi²

Section:Research Paper, Product Type: Journal-Paper
Vol.7 , Issue.6 , pp.113-119, Dec-2020

Online published on Dec 31, 2020

Copyright © Isabella Avwerosuoghene Onoharigho, Adeniyi Adewale Ogunjobi . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Plant growth-promoting rhizobacteria (PGPR) enhances plant growth by direct and indirect mechanisms, making them a good alternative to chemical fertilizers. Rhizosphere soil were collected and bacteria were isolated from them. The bacterial isolates obtained were screened for their ability to enhance the growth of plants. Those with the best activity were used to inoculate the seeds of the pepper plant before planting in an experimental plot. The plant growth parameters and the physico-chemical properties of the soil used were monitored before and after the experiment. Sixteen bacterial isolates belonging to Azospirillum spp., Pseudomonas spp., Aeromonas spp., and Bacillus spp. were obtained from the rhizosphere of habanero pepper plant. In all the bacterial isolates, Azospirillum brasilense C1 had the highest nitrogen fixed (0.002%), Pseudomonas putida P4 and Bacillus subtilis A2 had the largest zones of clearance of 4mm and 8mm, respectively. Plants inoculated with isolates had the highest growth, biomass, yield, and mineral nutrient content. T4 (Azospirillum brasilense C1 + Pseudomonas putida P4) had the highest values in root length, leaf length, leaf width, shoot length, number of fruit, and plant dry weight of 13.86cm, 8.69cm, 5.69cm, 18.43cm, 2.67 and 0.29g, respectively, over uninoculated controls. Soil treated with T7 (Azospirillum brasilense C1 + Pseudomonas putida P4 + Bacillus subtilis A2) had the highest mineral content compared to soil treated with chemicals. Thus, combined rhizobacteria inoculants inoculated into habanero pepper seeds are suitable for excellent growth and performance of habanero pepper plant and also for improving soil fertility.

Key-Words / Index Term :
PGPR, Habanero pepper, Soil fertility, Growth, Mineral uptake

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